Gate-operating mechanism



G. L. CURTIS.

am oPEHATmG MEcHAmsMv.

2 SHEETS-SHEET 2.

FILED JULY I8, i920.

gnnen/to@ l am. oww

@1mi/tune fio studs 49 on whichiiuts 50 are threaded, the

nuts retaining chains l. One chain 51 isV attached to the innerend of alever 41 fulcrumed at 42 on a bracket 43 carried by the post 3 and theother chain is attachedto a lever 52 fulcruined at 53 on av bracket 54carried by the post 1.` n

Counterweights 55 are `being slotted as indicated at 56, so that theycanbeslipped'readily on theA side portions of the arm 3l in advance ofthel clamp `58.

f The counterweights are provided with set j .screws 57 enabling theco-unterweights to be "portionsof the arm 3l by an eye 59,-the .clampmembers being located between the' heldgon the side portions of vthe armSi, in

. adjusted positions.

I Clamp members 5S'areheld ontheside clampfw44-and the counterweights55. lThe 'numeral 60 denotes, generally, a' longitudi! nallyjextensiblelink, including`- `a rod- 615 pivotedto the eye bolt 59. The rod '61,-is -slidable 'for adjustmentina tube 62 and is held therein by vmeans ofa set screw 63 threaded into the tube. a flattened end 64 provided withan opening 6 5. Thenumeral66 denotes a pair of clamp `members havingears ,61T connected byabolt 68.-The clamp'membersv y66 are providedwith..coop'erating` hooks `69 having` reduced throats 7 O. The hooks 69ppass through the opening 651 in the. Ailattened portion 64 of the. tube62. It is to'beobserved, referring l anglesto a tube 7l, whereon the`clamp mem` to4 Figure 2,.that whenthelink 60 `is in workingkpositiom-the hooks 69 rcannot be detached accidentally from the openingin the tube 62.7. The hooks v69 may -beenj gaged in-theopening 65,.however, iithe. link is swung` upwardlyl from the postv tion of lFigure2 until it stands at` right bers 66 are held by the bolt 68. `The tube71,

. which` maybe .denominated a transverse member, is provided with seats72 as shown `in Figure 4, the seats being adapted to .re-

ceive theupper` end lower portions oi the frame 7 of the gatef 6. Bolts'7B pass through the member l7 2 and engage the upper lendlowerportionsoi' the gate iframe T.

In practical operation, the arm l3l may be swung` froma remoteA point bydrawing on,` theflexible element 36.V Similarly, :when the Yagate 1s inal closedfposition,jas shown` 'in Figure l, the gate may be swung: tofanopen position, by manipulating either of the levers 4l or 52, theleversimparting' swinging movement to thegarm 3l through the inf strumentalityof the chains 5l. When the`l` arm 3l is swung on the stub post 5', thelinlr .60 swings the gate 6to an open position, the

arml swingingv tothe rightiFigue until it has passed a vertical linecoincident with the axis ci' the stub postl 5. During `the closing'operation, the member p 3l. is

provided, the .same` The 'tube 62 has weights, in adjustedpositionsonthe i .swung back into the position'oi" Figure l,

either drawino' on the flexible element 86, or manipulatingone of the'levers 416-52. The clamp 44 may be shifted alongthe arm'Bl so thattheflexible clementsl will holdthe levers 4l and 52 properly bal anced.'lThe counter-weights 55 may be `shifted alongy the-arm 31,'to regulatethe poise of they arm and to vary the center of mass of the arm. lt ispossible to movethe' clamp members 58 alone,` the arm 3l and-to'lengthen or shorten the link 60, the link be` ling, lengthened,` orshortened by sliding `the rod 61 in the tube 62', the set screw63fser-ving to hold the link at an adjusted length.

`Owing to the act'that the length of the link may be adjusted to tiltthe position ot the arm 3l` with respect tothe vertical.. may

be regulated, a feature which will be understood readily when j The.tube lor transverse. member` 71 may be shifted along' the grate hookboltsy 73 thereby accom modating` the deviceto Oates of diiiierent sizesit beine' 25 7 .11

Figure; l yis noted.`

possible to lengthen orI shorten the link 60,` i

as hereinbeiore explained. By loosening` Ythefbolt68, thecla-mp .members`66 may be third clamp in adjusted positions longitudinally oithe bar;a. lai-shaped arm; means for mountingthe arm atlitslower end forswinging movement; counter weights' longitudinally adjustable onthe sideportions of the arm;ineans :fior holding' the cou portions of the arm.;a fourth clamp ustable lon both side portions oit the aun. lon-,sltu'dinallyi of thearin'; means for liioldingg,l

the fourth clamp in adjusted positions on y the arm, `longitudinally ofthe arm; a longitudinallyl adjustable link pivotallyr con-. nected atone end withthe fourth clamp; meansfor assembling the ylinlr detachablywith, the thirdclamp; `means. for holding the link at adjusted lengths;and means for imparting/swinging movement to the arm. In testimony thatl claim the foregoing` as my own, l have hereto aiiixed `my signature inthe-presence oftwo witnesses.

Y v GEORGE L. CURTlS. W'itnesses;` j' i C. lnNiriivG, L. BENTING.

